Echinococcosis Diagnosis and Management

Diagnostic Approach

The World Health Organization (WHO) recommends a multidisciplinary approach for diagnosis, combining imaging with serological tests, with imaging being the primary diagnostic modality 1
Ultrasound is the initial imaging modality of choice for hepatic cysts 4
CT or MRI with intravenous contrast in arterial and venous phases is used for unclear findings 1
The WHO classification distinguishes between different cyst stages (CE1, CE2, CE3a, CE3b, CE4, CE5), which have therapeutic implications 1

Cystic echinococcosis (E. granulosus) can be asymptomatic or cause life-threatening complications, with symptoms including abdominal pain, hepatomegaly, and biliary obstruction 2, 3
Respiratory symptoms such as cough, dyspnea, and hemoptysis can occur in cases of lung involvement 2, 3
Fever and anaphylaxis can occur in cases of cyst rupture 2, 3

The WHO recommends a multidisciplinary approach, combining medical therapy with albendazole and surgical or percutaneous interventions, depending on cyst size, location, and WHO classification stage 5
Albendazole 400 mg twice daily with meals is recommended for patients ≥60 kg 5
Treatment cycles consist of 28 days of albendazole followed by 14-day drug-free intervals, repeated for 3 cycles 5
PAIR (puncture, aspiration, injection, re-aspiration) procedure plus medical therapy is recommended for large hepatic cysts (>5 cm) or complex cysts 5
Complete surgical excision with maximal lung parenchyma preservation is the treatment of choice for lung cysts 5

Pregnancy testing is obligatory before starting therapy in women of childbearing age 5
Effective contraception is required during treatment and 3 days after the last dose due to embryotoxicity 5
Patients with epidemiological risk factors must be investigated for neurocysticercosis before starting albendazole to prevent cerebral hypertensive episodes or seizures 5
Follow-up imaging (MRI or ultrasound) is recommended at least every 6 months until cyst resolution 5
Long-term follow-up is necessary for at least a decade in cases of alveolar echinococcosis 5